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(No Model.) M. E. CLARK. WINDOW 0R DOORBUTTON.

No. 539,913. Patented May 28, 1895 q/vi/l meooeo W in, M flmmwlfoz Nrran STATES ATENT Prion.

MERRILL E. CLARK, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO CHARLES F. BROWN AND AUSTIN H. BRADSHAW; OF SAME PLACE.

WINDOW OR DOOR BUTTON.

SPECIFICATION forming part of Letters Patent No. 539,913, dated May 28, 1895.

Application filed August 9, 1894. Serial No. 519,795. (No model) I .To all whom it may concern:

Be it known that I, MERRILL E. CLARK, a citizen of the United States, and a resident of the city and county of Worcester and Commonwealth of Massachusetts, have invented certain new and useful Improvements in Window-Fasteners, of which the following is a specification.

My improvement consists of a fastener so constructed that the window-sashes may be securely held in place in any desired position, whether the window is open or closed.

In the drawings, Figure 1 is a plan view of part of the ,window-frame and of the sashes in their normal position when the Window is closed and of the fastener, the latter being broken away in part to show the construction. Fig. 2 is a front view of the fastener, and Fig. 3 is a plan view of a modified form of the fastener.

In Fig. 1, 1 represents part of the frame of the window. 2 is one of the window-sashes, and 3 is the other'sash. To the sash 2 is attached the plate 4, provided with the projection 5 enlarged somewhat at the top, beneath which a shoulder may be formed, affording a proper bearing for the top of the hook, which engages with the said projection when the window is closed.

My improved fastener is mounted upon the other sash 3 and consists of a base with a horizontal portion 6 adapted to be secured to' one of the sashes, and the vertical portion 7.

The friction arm 8, is loosely pivoted to the plate 6, by the screw 9, and is provided at its opposite end with an enlarged surface adapted to support on its inner face the friction-plate 10, and on the opposite face two camshaped pins, one of which 11 appears in plan in Fig. 1. The friction-plate 10 may be loosely mounted in the enlarged face of the friction-arm 8 bymeans .of an inwardly. projecting lip which works as an eccentric upon the pin or axis 12, and preferably with its bearing surface of rubber. The advantage of having the friction-plate so mounted is thatv it readily adcessful working of my fastener, and in the modified form, shown in Fig. 3, the frictionplate is rigid. The spring 13, between the inner side of friction-arm Sand the vertical portion 7 of the base, holds the arm 8 in its normal position when the fastener is notin operation. The lever 14 is loosely pivoted to the piece 15, upwardly projecting from the base 6 with its opposite or inner face adapted to engage with the cam-shaped pins 11 in such a manner that when the arm of the lever is raised in the direction of the arrow, Fig. 2, the friction-plate 10 will be forced against the opposite sash of the window. The hook 16 is loosely pivoted at 17, and is adapted to en gage with the projection 5 on the plate 4 secured to the opposite sash of the window.

Having described the several parts of the fastener and their relation to eachother, I

will proceed to describe their mode of opera-' tion.

Fig. 1 represents the window closed, and the sashes locked together in the usual manner by the hook 16-my improved fastener not being in operation. If, now, it is desired to open the window part-way, and secureit in'place at such point, the hook is slipped away from itsdoearing upon plate Land projection 5 to occupy the position indicated by dotted lines in Fig. 1. The sashes may then be moved into the desired relative position andithere held by pushing up the lever 14: in the direction of the arrow, Fig. 2, which, acting at its opposite end upon the cam shaped pins 11, forces the free end of friction-arm 8 and consequently the friction-plate 10 against the opposite sash with sufficient force to hold the sashes in the same relative position until the lever-arm is thrown down, and the pressure released. This, alone, would suffice for holding the sashes in any position whether the window was closed or open; but, as the tendency is to push the sashes apart, which may be objectionable in cold weather, I canv the center of the sash I can use a modified form of my fastener, shown in Fig.3, in which the construction is the same in principle as in Fig. 1, and the same in form, excepting that the hook is omitted,and the friction lever moves in a horizontal, instead of in a vertical plane.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a window fastener, the combination of a friction-plate suitably mounted on one of the sashes and adapted to be brought into and held in contact with the other sash, whereby both sashes may be firmly held in place at any desired point, and a hook, whereby both members of the sash may be locked together when the window is closed, substantially as set forth.

2. As a new article of manufacture, a window-fastener having a base adapted to receive an arm, loosely pivoted at one end to said base, and adapted to receive at its other end a friction-plate, and with a spring intermediate the arm bearing said friction plate and the vertical portion of the base, and a lever, whereby the friction-plate may be operated, substantially as shown and described.

3. As a new article of manufacture, a window-fas'ten'er having a base adapted to be attaohed to one of the sashes and to receive an arm loosely pivoted at one end to said base, and adapted to receive, at its other end, a friction-plate, and with a spring intermediate the arm bearing said friction-plate and the vertical portion of the base, and a lever, whereby the friction-plate may be operated, and a hook adapted to engage with a suitable projection on the other member of the sash, whereby both members of the sash may be locked together when the window is closed, substantially as shown and described.

4. In a window fastener, the combination of a friction plate suitably mounted on one of the sashes, and adapted to work upon an eccentric, and to be brought into and held in.

contact with the other sash, whereby both sashes may be firmly heldin place at any desired point, and :a hook, whereby both members of the sash may be locked together when the window is closed.

MERRILL E. CLARK. Witnesses:

O. G. WASHBURN, R. M. WASHBURN. 

